Qualitative evaluation of machined surface of aluminum alloy AlCu4Mg1 depend on feed rate / Frantisek Botko, Michal Hatala, Zuzana Mitalova, Robert Cep, Miroslav Rimar, Andrej Bernat, Jaroslav Vybostek   .  Manufacturing Technology.Vol. 18, no. 2, strana 201-207.